year. Finally, review and update your cost-benefit data periodically and as signif-
icant changes in the project occur.
4.7 BENEFIT CALCULATIONS EXAMPLES
The following are five brief examples that illustrate how to calculate the benefit
of usability engineering. The examples are a mixture of actual case study data
and composite cases, and come from Web and traditional application projects.
There is value in understanding the logic, the fundamental aspects, and busi-
ness value of both new and older examples. Those who do not understand
history are doomed to repeat it.
4.7.1 Increased Sales or Revenues Resulting from Increased
Completion Rates on a Web site ...